131 0506 Low 05 Z - Photo 9131982

After the planetary gear assembly is put together, the reaction carrier is assembled with the sun gearshaft and the low roller clutch. This one-way roller clutch locks the assembly when rotated in one direction, and freewheels in the other. This is done by ramps (A) on the inside of the reaction carrier, causing the rollers (B) to roll up the ramps to lock the assembly.